server/PickList/PickListFetcher.cs

@@ -0,0 +1,101 @@
+using System.Collections.Generic;
+using Newtonsoft.Json.Linq;
+using Sockeye.Models;
+using System.Threading.Tasks;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.Logging;
+
+
+namespace Sockeye.PickList
+{
+    internal static class PickListFetcher
+    {
+        internal static async Task<List<NameIdActiveItem>> GetResponseAsync(IAyaPickList PickList, string autoCompleteQuery,
+        string tagSpecificQuery, bool includeInactive, long[] preIds, string variant, AyContext ct, ILogger log, string overrideTemplate)
+        {
+
+            //Sort out effective Template
+            string Template = null;
+            if (string.IsNullOrWhiteSpace(overrideTemplate))
+            {
+                //Attempt to fetch custom template              
+                var t = await ct.PickListTemplate.FirstOrDefaultAsync(z => z.Id == ((long)PickList.DefaultListAType));
+                if (t == null)
+                {
+                    Template = PickList.DefaultTemplate;
+                }
+                else
+                {
+                    Template = t.Template;
+                }
+            }
+            else
+            {
+                Template = overrideTemplate;
+            }
+
+            //parse the template 
+            var jTemplate = JArray.Parse(Template);
+
+            //Get the field key names in a list from the template
+            List<string> TemplateColumnNames = PickList.GetFieldListFromTemplate(jTemplate);
+
+            //BUILD THE QUERY  
+            var q = PickListSqlBuilder.Build(PickList, TemplateColumnNames, autoCompleteQuery, tagSpecificQuery, includeInactive, preIds, variant);
+
+            //If want to log all queries
+            //log.LogInformation(q);
+
+            //RETURN OBJECTS  
+            var ret = new List<NameIdActiveItem>();
+
+            //QUERY THE DB
+            using (var command = ct.Database.GetDbConnection().CreateCommand())
+            {
+                await ct.Database.OpenConnectionAsync();
+
+                //GET DATA RETURN ROWS
+                command.CommandText = q;
+                try
+                {
+                    using (var dr = await command.ExecuteReaderAsync())
+                    {
+                        while (dr.Read())
+                        {
+                            //query is always in the same order:
+                            //plId, plActive, plName
+                            ret.Add(new NameIdActiveItem
+                            {
+                                Id = dr.GetInt64(0),
+                                Active = dr.GetBoolean(1),
+                                Name = dr.GetString(2)
+                            });
+                        }
+                    }
+                }
+                catch (Npgsql.PostgresException e)
+                {
+                    //log out the exception and the query
+                    //This may be called internally in *Biz classes who don't have a log of their own
+                    if (log == null)
+                        log = Sockeye.Util.ApplicationLogging.CreateLogger("PickListFetcher");
+                    log.LogError("PickList query failed unexpectedly.  Query was:");
+                    log.LogError(q);
+                    log.LogError(e, "DB Exception");
+                    throw new System.Exception("PickListFetcher - Query failed see log");
+                }
+                catch (System.Exception e)
+                {
+                    //ensure any other type of exception gets surfaced properly
+                    //log out the exception and the query
+                    log.LogError("PickListFetcher unexpected failure.  Query was:");
+                    log.LogError(q);
+
+                    log.LogError(e, "Exception");
+                    throw new System.Exception("PickListFetcher - unexpected failure see log");
+                }
+            }
+            return ret;
+        }
+    }//eoc
+}//eons